Fitting for reinforced concrete structures.



No. 879,163. PATENTED FEBflS, 1908. G. M. GRAHAM. FITTING FOR REINFORCEDCONCRETE STRUCTURES.

APPLICATION r1 5 .17 19 L D OUT 4 SHBETS-SHEET 1.

PATENTED FEB. 18, 1908.

- G. M. GRAHAM.

NFOROED CONCRETE STRUCTURES. APPLICATION rum) 001217, 1907.

FITTING FOR R'EI 4 sums-sum 4.

UNITED STATES PATENT OFFICE;

GEORGE M. GRAHAM, ()l" (JIIICAGO, II/IJIXOIS, ASSHRXOR TO G. :LEDWARDKOHLER, OF

' llIICM'lU, ILLINOIS.

FITTING FOR'REINFORCED CONCRETE STRUCTURES.

Specification of Letters Patent.

Patented Feb. 18, 1908.

Application filed October 1'7:- 1907. Serial No. 397-848- To all whom itmay concern:

Be it known that I, GEORGE M. GRAHAM, a citizen of the United States ofAmerica, and a resident of (,ll-iioago, in the county of Cook and Stateof Illinois, have invented certain new and useful Improvements inFittings for Reinforced Concrete Structures, of which the following is aspecification.

This invention relates to fittings or couphuge for reinforced concreteconstructions, and more especially to the type of such fittings formingthe subject matter of my prior Letters Patent No. 865,489 of Sept.10,1907. And the present improvement has for its object to provide'asimple and efiicient struc- .tural formation and combination of partswhereby an easy assemblage of the skeleton reinforcing frame-andthefittings is attained, and with which a very rigid and substantialconnection of the parts is provided, all as will hereinafter more fullyappear.

In the accompanying drawings: Figure 1, is a top view of the fittingin-place uponthe tubular reinforcing frame of a concrete structure, withone of the vertical columns of said frame in section. Fig. 2, isasimilar view with the upper section of thefitting removed and with thevertical attaching bolts in section. Fig. 3, is a side elevation showingthe fitting in place. Fig. 4, is a vertical section on line a:-a: Fig.3. Fig.5, is a perspective View of the upper member of the fitting. Fig.6 is a perspective .view of the lower member of the fitting; Fi 7, is aside elevation of a modified form of t e fittin Fig. 8, is a verticalsection on line m:c ig. 7.

Similar numerals of reference indicate like parts in. the several views.

Referring to the drawings, 1 and2 represent the respective upper andlower sections of the fitting, the meeting surfaces of which arehorizontal and formed by annular horizontal webs or flanges 3 and 4,which in turn are provided with a series of elongated orifices for thepassage of the bolts 5 by which the sections are secured together.

G and 7 are secondary annular horizontal webs or flanges havin a spacedrelation .to the aforesaid webs or anges 3 and 4, and integrallyconnected thereto, as hereinafter described.

8 and 9 are annular necks formed on the webs or flanges 6 and 7, andhaving a smaller diameter than such flanges in order to proas shown.

ings, and

l vide supporting abutments or rims 10 and 11 at th sv points where suchneckspjoin such flanges. Said necks are adapted to fit within the boreof the tubular columns 12 and 13, and to be capable of limited expansiontherein, and to such end the'respective up or and lower sections 1 and,2 are formed wit radial slits 14 and 15, to permit of ex ansion afterthe parts are assembled; suc expansion may be effected by tapering keysdriven into said slits, or by means of the radial bolts 16 and 17 bywhich the. ends of the aforesaid columns 12 and 13 are secured to theannular necks S and 9. The elon atedform of the orifices for theattaching bolts 5 heretofore referred to, is to avoid interference onthe part of said bolts with the above described expansion of the fittingsections.

18 are bolts passing throu h flanges 19 at the margins of the slits 14an 15, and adapted to impart'initial contraction to the fitting sectionsso that they may be readily intro duced into place.

20 and 21 are pluralities ofradially' arranged semi-circular webs whichform the connection between the above described flanges of therespective fitting sections and to such end are integrally formed withsaid flanges as shown. Such webs provide semicircular recesses orcavities in the opposed surfaces of the flanges 3 and 4, and so thateach. oplposed pair of such semi-circular cavities w constitute a singlecylindrical cavity for the rece tion of the end of a tubular girder 22of t e skeleton reinforcing structure In an ordinary form of the presentfitting four of such semi-circular cavities will be formed in a fittingsection, and in right-angle relation, as shown in the drawadapted to beplaced upon any part of the as so constructed the fitting is I exteriorof a tubular frame girder 22, and

adapted longitudinally thereon to the proper position to receive t eends of companion girder 22; Any other usual arrangement of saidcavities may be made to meet the varied requirements of the art, andwithout departing from the scope of this part of the present invention.

A material part of the present construc-v each tion consists in thearrangement of semi-circular web 20, 21, midway of [the walls of theannular necks 8 and 9 and so that portions of said webs'ZO and 21 willexsection in right angle relation to the semi at the sides of thegirders tend into the open central portion of the.

fitting sections. SllChCOIlStIHC'tiOIl provides a very com act'andsubstantial support or connection. or'the tubular frame members, andis adapted to withstand in ah eflective' manner the usual lateralstrains imposed in the assemblage of the parts of a-skeleton structure.g l

23 are open top recesses formed in the'top surface of the flange 4 ofthe lower fitting rest in the open top recesses 23 aforesaid to vpositively holdthe tubular girder members up er fitting with the againstindependent longitudinal movem nt in the fittings.

l/Vhere two a duplex girder as fully set 865,490 of Sep eiit fittingswill be placed in corresponding relation and held separate by a sectionof tubing of the required length and diameter; it is preferable, for anumber of uses, however to'c'oniiect the lower section of the up orsection of the lower fitting by an integra ly formed tubular member 25,.as illustratedin Figs. 7 and 8.

Having thus fully described my said inveiition what I claim as new' anddesire to secure by Letters Patent, is;

1. A fitting for reinforced ccf rete struc-- tu'res, comprising iiicombination, upper and low'ersections provided with necks adapted to fitthe interioiwof tubular frame. members and formed with radial slits, andmeans for effecting an ex ansion of said sections.

2. A fitting or reinforced. concrete structures, comprising incombination, upper and lowersections, each consisting of a pair ofhorizontal flanges a series of semi-circular Webs connecting saidflanges. together and annular necks projecting from one flange of eachsection, and tions together. y

3. A fittingfor reinforced concrete structures, comprising incombination, upper and lower sections, each consisting of a pair ofhorizontal flanges a series of semi-circular webs connecting saidflangesflogether and annular necks means for securing said. secand areadapted to lower sections, v horizontal flanges a series ofSBIIll-CIICIllflI girders 22 of a skeletodreihforcing structure areplaced in adjacent rela- 'tion to constitute forth ininy former patentsNos. 865,489 and t .10, 1907, two of the pres-- each section, and boltspassing through ad- 'same' together.

4. A fitting for. reinforced concrete structures, comprising incombination, upper and lower sections, each consisting of a air ofhorizontal flanges a' series webs 'con'necting'said flanges togetherandeach section, said sectionsbeingformed with radial slits, means foreffecting an expansion of'sai'd sections, and means sections together..5. A fitting for reinforced concrete structures, comprising incombination, upper and horizontal flanges a series of semi circularannular necks'projecting fromone flange of each section, said sectionsbeing formed with radial slits, means for effecting an initialcontraction of the sections, and means for securing thev sectionstogether.

6-. A" fitting tures, comprising in combination, upper and eachconsisting of a pair of webs connecting said flanges together andannular necks pro ecting from one flange of each section, said sectionsbeing formed with flanges at the margins of the slits an bolts securingthe sections together.

sections, each consisting of a pair of horizontal flanges a series ,ofsemi-circular annular necks projecting from one flan 'e of each section,and means for securing said sections together, one of said sectionshaving transverse recesses in its meeting face ada ted to receive theends of a holding pin carried by a tubular girder or the like.

tures; comprislower sections, horizontal flanges a series ofsemi-circular annular necks projecting from one flange of each section,radial slits, means for effecting an expansion transverse recesses inits meeting face ada t,- ed to receive the ends of a holding pi ncarried by a tubulargirder or the like.

'9. A fitting for reinforced concrete structures, comprising incombination, upper and lower'sections, each consisting of a pair-ofhorizontal flanges a series of semi-circular webs connecting saidprojecting fromone flange of annular necks projecting from one flange of.jacent flanges of the sections to secure the webs connectingsaidflanges together and radial slits, means for effecting an initialcontraction of the sections, the same com rising passing through saidflanges, and means for 7. A fitting for reinforced concrete struc-.tures, comprising in combination, upper and, lower webs connecting saidflanges together and said sections being formed with.

of said sections, and means for securing the sec-tions together, one ofsaid seetions having.

flanges together and of semi-circular annular necks projecting from oneflange of for securing the lower sections, each consisting of a pair offor reinforced concrete struo- 8 A fitting for reinforced concretestruc- I g in combination, upper and each consisting of a pair of websconnecting said flanges together and i v bV a tubular girder or thehorizontal flanges a series of k webs connecting said flanges eachsection, said sections being formed with, horizontal flanges a seriesradial slits, means for effecting a contraction of said sections, andmeans for securing said sections together, one of said sections havingtransverse recesses at its meeting face adapted to receive the ends of aholding pin carried u like.

10. A fitting forreinforced concrete structures, comprising incombination, upper and lower sections, each consisting of a pair ofsemi-circular together and annular necks projecting from one flange ofeach section, said sections being formed with radial slits, means foreffecting an initial ccntraction of said sections, the same com )risingflanges at the margins of the slits anr bolts passing through saidflanges, and means for securing the sections together, one of saidsections having transverse recesses in its meetingface adapted toreceive the ends of a holding pin carried by a tubular girder or the 11.A fitting for reinforced concrete structures, comprlsmg in combination,upper and, lower sections, each consisting of a pair'of circular We Websconnecting said flanges together and annular necks projecting from oneflange of each section, sald sections radial slits assing through one ofthe semis aforesaid, means for effecting an expansion of said sections,and means for securing the sections together.

'12. A fitting for reiniorced concrete strucof semi-circular beingformed with tures, comprising in combination, upper and lower sections,each consisting of a pair of horizontaljflanges a series of semicircular'ebs connecting said flanges together and annular necks projecting fromone flange of each section, said sections being formed with radial slitsassing through one of the semicircular we s aforesaid, means foreffectin' an initial contraction of the sections, and means for securingthe sections together.

Signed at Chicago, Illinois. this 2nd day of October 1907. v

GEORGE M. GRAHAM.

